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Search: id:A026037
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| A026037 |
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a(n) = dot_product(1,2,...,n)*(3,4,...,n,1,2). |
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+0
4
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| 11, 22, 40, 67, 105, 156, 222, 305, 407, 530, 676, 847, 1045, 1272, 1530, 1821, 2147, 2510, 2912, 3355, 3841, 4372, 4950, 5577, 6255, 6986, 7772, 8615, 9517, 10480, 11506, 12597, 13755, 14982, 16280, 17651, 19097, 20620, 22222, 23905, 25671, 27522, 29460, 31487, 33605, 35816, 38122, 40525, 43027
(list; graph; listen)
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OFFSET
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3,1
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FORMULA
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n(2n^2-3n+13)/6. - R. Stephan, Apr 30 2004
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MATHEMATICA
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s=0; lst={}; Do[s+=n^2+2; If[s>10, AppendTo[lst, s]], {n, 0, 6!, 1}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 07 2008]
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CROSSREFS
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Column 2 of triangle A094414.
Sequence in context: A084025 A061157 A144378 this_sequence A122613 A115768 A005015
Adjacent sequences: A026034 A026035 A026036 this_sequence A026038 A026039 A026040
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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